echols.html - n.
1 the meaningless repetition of another person's spoken words.
2 the repetition of speech by a child learning to talk. [mod.L f. Gk ekho echo + lalia talk]

echols.html - n. & v.
--n.

(pl. -oes)
1 a the repetition of a sound by the reflection of sound waves. b the secondary sound produced.
2 a reflected radio or radar beam.
3 a close imitation or repetition of something already done.
4 a person who slavishly repeats the words or opinions of another.
5 (often in pl.) circumstances or events reminiscent of or remotely connected with earlier ones.
6 Bridge etc. a conventional mode of play to show the number of cards held in the suit led etc.

--v.

(-oes, -oed)
1 intr. a (of a place) resound with an echo. b (of a sound) be repeated; resound.
2 tr. repeat (a sound) by an echo.
3 tr. a repeat (another's words). b imitate the words, opinions, or actions of (a person).

echo chamber an enclosure with sound-reflecting walls. echo location the location of objects by reflected sound. echo-sounder sounding apparatus for determining the depth of the sea beneath a ship by measuring the time taken for an echo to be received. echo-sounding the use of an echo-sounder. echo verse a verse form in which a line repeats the last syllables of the previous line.

echoer n. echoless adj. [ME f. OF or L f. Gk ekho, rel. to ekhe a sound]

echols.html - n.
Med. a record produced by echocardiography.

echols.html - n.
Med. the use of ultrasound waves to investigate the action of the heart.

echocardiograph n. echocardiographer n.

echols.html - n.
Med. a record produced by echoencephalography.

echols.html - n.
Med. the use of ultrasound waves to investigate intracranial structures.